Android-完美解决EditText和ScrollView的滚动冲突 转载

https://blog.51cto.com/u_15073486/3650167

public class MainActivity extends Activity implements View.OnTouchListener {

    private EditText mEditText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mEditText = (EditText) findViewById(R.id.edit_text);
        mEditText.setOnTouchListener(this);
    }

    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {
        //触摸的是EditText并且当前EditText可以滚动则将事件交给EditText处理；否则将事件交由其父类处理
        if ((view.getId() == R.id.edit_text && canVerticalScroll(mEditText))) {
            view.getParent().requestDisallowInterceptTouchEvent(true);
            if (motionEvent.getAction() == MotionEvent.ACTION_UP) {
                view.getParent().requestDisallowInterceptTouchEvent(false);
            }
        }
        return false;
    }

    /**
     * EditText竖直方向是否可以滚动
     * @param editText  需要判断的EditText
     * @return  true：可以滚动   false：不可以滚动
     */
    private boolean canVerticalScroll(EditText editText) {
        //滚动的距离
        int scrollY = editText.getScrollY();
        //控件内容的总高度
        int scrollRange = editText.getLayout().getHeight();
        //控件实际显示的高度
        int scrollExtent = editText.getHeight() - editText.getCompoundPaddingTop() -editText.getCompoundPaddingBottom();
        //控件内容总高度与实际显示高度的差值
        int scrollDifference = scrollRange - scrollExtent;

        if(scrollDifference == 0) {
            return false;
        }

        return (scrollY > 0) || (scrollY < scrollDifference - 1);
    }
}